batgrbproduct analysis for trigger=832368
batgrbproduct Analysis for Trigger=832368
Analysis Summary
Notes:
- 1) No attempt has been made to eliminate the non-significant decimal places.
- 2) This batgrbproduct analysis is done of the amount of data for this trigger downloaded to date.
- 3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.
- 4) This page will be updated for up to 15 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Tue May 15 16:22:37 EDT 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger832368/GCN5_download_cron
======================================================================
Trigger: 00832368 Segment: 000
BAT Trigger Time: 547997154.432 [s; MET]
Trigger Stop: 547997156.48 [s; MET]
UTC: 2018-05-14T13:25:33.490260 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 197.400829211167 Dec: 36.9695482478951 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.83
Image Trigger?: NO
Rate S/N Ratio: 10.3923048454133 [ if not an image trigger ]
Image S/N Ratio: 7.83
Flight Position: [ source = BAT ]
RA: 197.400829211167 Dec: 36.9695482478951 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 197.382289246451 Dec: 36.9699697693768 [deg; J2000]
{ 13h 09m 31.7s , +36d 58' 11.9" }
+/- 1.28275752032844 [arcmin] (estimated 90% radius based on SNR)
+/- 0.428749089404217 [arcmin] (formal 1-sigma fit error)
SNR: 21.3120947319761
Angular difference between Flight and Ground position is 0.889113 arcmin
Partial Coding Fraction: 0.9140625 [ including projection effects ]
Duration
T90: 36.3959999084473 +/- 181.892871552812
Measured from: -6.46799993515015
to: 29.9279999732971 [s; relative to TRIGTIME]
T50: 17.5520000457764 +/- 6.30503678793706
Measured from: 1.10800004005432
to: 18.6600000858307 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.291999936103821
to: 1.29199993610382 [s; relative to TRIGTIME]
Total Fluence
Measured from: -8.2960000038147
to: 211.771999955177 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.554751 0.581844 0.596325 0.091675
0.086677 0.089455 0.077357 0.066487 [error]
Peak 0.035677 0.028439 0.025203 0.006975
0.006502 0.006681 0.005841 0.004881 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
=== Fluence/Peak Flux Summary ===
Model Band1 Band2 Band3 Band4 Band5 Total
15-25 25-50 50-100 100-350 15-150 15-350 keV
Fluence Power-law 1.35e-07 2.65e-07 4.03e-07 1.33e-06 1.13e-06 2.14e-06 erg/cm2
Error 3.32e-08 3.92e-08 7.55e-08 5.51e-07 1.84e-07 6.06e-07 erg/cm2
Peak flux Power-law 2.86e-01 2.46e-01 1.45e-01 1.28e-01 7.32e-01 8.04e-01 ph/cm2/s
Error 8.54e-02 5.03e-02 4.69e-02 8.07e-02 1.50e-01 1.71e-01 ph/cm2/s
Fluence Cutoff-PL 1.35e-07 2.66e-07 4.02e-07 1.32e-06 1.13e-06 1.94e-06 erg/cm2
Error 2.65e-08 4.23e-08 7.79e-08 8.58e-07 1.88e-07 6.61e-07 erg/cm2
Peak flux Cutoff-PL 2.84e-01 2.48e-01 1.45e-01 1.14e-01 7.30e-01 7.91e-01 ph/cm2/s
Error 8.76e-02 5.95e-02 4.89e-02 9.08e-02 1.51e-01 1.90e-01 ph/cm2/s
Fluence Band 5.81e-07 1.05e-06 1.12e-06 1.60e-06 3.33e-06 4.36e-06 erg/cm2
Error 8.61e-08 1.11e-07 1.68e-07 -------- -------- -------- erg/cm2
Peak flux Band 3.02e-01 2.66e-01 1.13e-01 6.56e-02 7.14e-01 7.46e-01 ph/cm2/s
Error -------- -------- -------- -------- 1.50e-01 1.65e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.395 0.254 - - 5.31e-04 7.61e-05 71.750 57
CPL 1.338 0.909 575.3 0.0 5.68e-04 0.00e+00 71.750 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.766 0.379 - - 5.38e-03 1.33e-03 48.580 57
CPL 1.630 1.087 104.3 0.0 6.43e-03 0.00e+00 48.580 56
Model : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index : photon index: E^-{Ph_index} (minus sign is not included in the index)
Ph_90err : 90% error of the photon index
Epeak : Epeak in keV
Epeak_90err: 90% error of Epeak
Norm : normalization at 50 keV in PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2 : Chi-Squared
dof : degree of freedom
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
T90 in the 50-300 keV band: 25.600000 sec.
T50 in the 50-300 keV band: 9.792000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 220.068 -8.296 211.772
T90 36.396 -6.468 29.928
T50 17.552 1.108 18.660
Peak 1.000 0.292 1.292
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
197.3823 +36.9700 0.0090 15.6 47.0 1.5968 21.3 TRIG_00832368
------------------------------------------
Foreground time interval of the image:
-8.296 29.369 (delta_t = 37.665 [sec])
Background time interval of the image:
-239.432 -8.296 (delta_t = 231.136 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
- 5) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
- 6) Time of each bin is in the middle of the bin.
1 s binning
From T0-310 s to T0+310 s
From T100_start - 20 s to T100_end + 30 s
Full time interval
64 ms binning
Full time interval
From T100_start to T100_end
From T0-5 sec to T0+5 sec
16 ms binning
From T100_start-5 s to T100_start+5 s
8 ms binning
From T100_start-3 s to T100_start+3 s
2 ms binning
From T100_start-1 s to T100_start+1 s
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) For long bursts, a spectral fit of the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
- 3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.
- 4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from -8.296 sec. to 211.772 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.39538 ( -0.253201 0.254225 )
Norm@50keV : 5.31136E-04 ( -7.63601e-05 7.57537e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.75 using 59 PHA bins.
# Reduced chi-squared = 1.259 for 57 degrees of freedom
# Null hypothesis probability = 9.036527e-02
Photon flux (15-150 keV) in 220.1 sec: 6.46150E-02 ( -0.00914015 0.00915305 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.13067e-06 ( -1.82329e-07 1.85266e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -8.296 sec. to 211.772 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.33769 ( -0.904596 0.913593 )
Epeak [keV] : 575.328 ( -9992.37 -9992.37 )
Norm@50keV : 5.68022E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.75 using 59 PHA bins.
# Reduced chi-squared = 1.281 for 56 degrees of freedom
# Null hypothesis probability = 7.644786e-02
Photon flux (15-150 keV) in 220.1 sec: 6.46173E-02 ( -0.0093396 0.0091249 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.12718e-06 ( -1.87778e-07 1.87692e-07 ) ergs/cm2
Band function
Time interval is from -8.296 sec. to 211.772 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.90016 ( -4.90016 -4.90016 )
beta : -1.45526 ( -0.296132 0.276423 )
Epeak [keV] : 22.8220 ( -22.822 7.15456 )
Norm@50keV : 76.1161 ( -10.5912 251227 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.21 using 59 PHA bins.
# Reduced chi-squared = 1.295 for 55 degrees of freedom
# Null hypothesis probability = 6.973485e-02
Photon flux (15-150 keV) in 220.1 sec: 6.44292E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.33194e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 17.1451 (-3.21796 4.04178)
R^2/D10^2 : 4.63397E-03 (-0.00234003 0.00474516)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 87.41 using 59 PHA bins.
# Reduced chi-squared = 1.534 for 57 degrees of freedom
# Null hypothesis probability = 5.905757e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.091e-08 1.796e-08
25- 50 2.714e-07 6.396e-08
50-150 5.710e-07 1.580e-07
15-150 9.033e-07 2.032e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-69.5318 -200)
Norm : 0.264928 (-0.0371328 0.0371328)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.18 using 59 PHA bins.
# Reduced chi-squared = 1.284 for 57 degrees of freedom
# Null hypothesis probability = 7.309743e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.452e-07 8.237e-08
25- 50 2.793e-07 1.569e-07
50-150 6.126e-07 3.434e-07
15-150 1.037e-06 5.748e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.21727 (-1.48668 2.18694)
R1^2/D10^2 : 0.195289 (-0.14366 0.608102)
kT2 [keV] : 25.6355 (-6.09395 11.8124)
R2^2/D10^2 : 1.05717E-03 (-0.000734759 0.00158959)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.34 using 59 PHA bins.
# Reduced chi-squared = 1.261 for 55 degrees of freedom
# Null hypothesis probability = 9.244549e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.498e-07 7.968e-08
25- 50 2.401e-07 1.124e-07
50-150 7.353e-07 3.991e-07
15-150 1.125e-06 5.173e-07
Peak spectrum fit
Power-law model
Time interval is from 0.292 sec. to 1.292 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.76550 ( -0.363374 0.393827 )
Norm@50keV : 5.38259E-03 ( -0.00136073 0.00130117 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.58 using 59 PHA bins.
# Reduced chi-squared = 0.8523 for 57 degrees of freedom
# Null hypothesis probability = 7.786382e-01
Photon flux (15-150 keV) in 1 sec: 0.732022 ( -0.14958 0.149581 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.96258e-08 ( -1.24621e-08 1.29859e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.292 sec. to 1.292 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.62996 ( -1.44674 0.727174 )
Epeak [keV] : 104.296 ( )
Norm@50keV : 6.43015E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.58 using 59 PHA bins.
# Reduced chi-squared = 0.8675 for 56 degrees of freedom
# Null hypothesis probability = 7.487954e-01
Photon flux (15-150 keV) in 1 sec: 0.730360 ( -0.151725 0.150753 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.88981e-08 ( -1.38889e-08 1.36171e-08 ) ergs/cm2
Band function
Time interval is from 0.292 sec. to 1.292 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.94323 ( -4.94323 -4.94323 )
beta : -2.07227 ( -0.817282 0.500194 )
Epeak [keV] : 25.4100 ( -25.41 5.84286 )
Norm@50keV : 643.039 ( -129.517 4.92506e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.69 using 59 PHA bins.
# Reduced chi-squared = 0.8489 for 55 degrees of freedom
# Null hypothesis probability = 7.798974e-01
Photon flux (15-150 keV) in 1 sec: 0.713753 ( 6.28625 -0.149164 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.98239 (-2.38498 4.4443)
R^2/D10^2 : 0.501457 (-0.381545 1.12028)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.62 using 59 PHA bins.
# Reduced chi-squared = 0.9933 for 57 degrees of freedom
# Null hypothesis probability = 4.892649e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.869e-09 3.608e-09
25- 50 1.667e-08 7.022e-09
50-150 6.323e-09 3.931e-09
15-150 3.087e-08 1.183e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 101.588 (-54.5148 -102.449)
Norm : 3.24083 (-0.788548 1.14023)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.83 using 59 PHA bins.
# Reduced chi-squared = 0.8566 for 57 degrees of freedom
# Null hypothesis probability = 7.709636e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.471e-09 2.751e-09
25- 50 1.469e-08 7.315e-09
50-150 2.402e-08 1.788e-08
15-150 4.719e-08 2.863e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.89067 (-1.6185 2.09581)
R1^2/D10^2 : 1.95934 (-1.34033 4.68789)
kT2 [keV] : 27.1811 (-27.3598 58.747)
R2^2/D10^2 : 6.94802E-03 (-0.00652549 0.0350242)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.75 using 59 PHA bins.
# Reduced chi-squared = 0.8319 for 55 degrees of freedom
# Null hypothesis probability = 8.084102e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.646e-09 5.575e-09
25- 50 1.346e-08 7.400e-09
50-150 2.782e-08 1.670e-08
15-150 5.093e-08 2.718e-08
Plot creation:
Tue May 15 16:28:08 EDT 2018